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tty: n_tty: use do-while in n_tty_check_{,un}throttle()

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This change gets rid of the complicated exit from the loops. It can be
done much easier using do-while loops.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230919085156.1578-6-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-09-19 10:51:46 +02:00 committed by Greg Kroah-Hartman
parent c2b0fb9f69
commit 043c8a7c01
1 changed files with 7 additions and 12 deletions
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19
drivers/tty/n_tty.c
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@ -249,15 +249,12 @@ static void n_tty_check_throttle(struct tty_struct *tty)
if (ldata->icanon && ldata->canon_head == ldata->read_tail)
return;
while (1) {
int throttled;
do {
tty_set_flow_change(tty, TTY_THROTTLE_SAFE);
if (N_TTY_BUF_SIZE - read_cnt(ldata) >= TTY_THRESHOLD_THROTTLE)
break;
throttled = tty_throttle_safe(tty);
if (!throttled)
break;
}
} while (tty_throttle_safe(tty));
__tty_set_flow_change(tty, 0);
}
@ -279,16 +276,14 @@ static void n_tty_check_unthrottle(struct tty_struct *tty)
* we won't get any more characters.
*/
while (1) {
int unthrottled;
do {
tty_set_flow_change(tty, TTY_UNTHROTTLE_SAFE);
if (chars_in_buffer(tty) > TTY_THRESHOLD_UNTHROTTLE)
break;
n_tty_kick_worker(tty);
unthrottled = tty_unthrottle_safe(tty);
if (!unthrottled)
break;
}
} while (tty_unthrottle_safe(tty));
__tty_set_flow_change(tty, 0);
}